Science with Henrica

On Tuesday Henrica came down to see us from the University of Otago and showed us some cool science experiments, the first one she showed us was one with coke and milk, she put some milk into a glass of budget coke and we left it till later. When we looked after we did our other experiment we saw that the acid in the coke had eaten all the calcium out of the milk.

We also did a fun spud gun experiment where we had a long straw and a skewer and and we stuck a piece of potato in each end and then pushed one end up the straw to shoot the front piece out. This happened because of the air pressure that built up in the straw and the friction on the pieces of potato. 

After we finished we talked about taking our results and making tables and graphs to record what we found out, then we had to scramble around the tennis court to find the pieces the birds hadn't got, so they wouldn't grow into potato plants on the turf. 

We all thought our experiments were really fun, and we are now thinking of doing a follow up spud gun experiment to finish.

Holly

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